Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1755175AbXLDVHB (ORCPT ); Tue, 4 Dec 2007 16:07:01 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1752214AbXLDVGe (ORCPT ); Tue, 4 Dec 2007 16:06:34 -0500 Received: from 75-130-111-13.dhcp.oxfr.ma.charter.com ([75.130.111.13]:53412 "EHLO novell1.haskins.net" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1751081AbXLDVGb (ORCPT ); Tue, 4 Dec 2007 16:06:31 -0500 From: Gregory Haskins Subject: [PATCH 01/23] Subject: SCHED - Add rt_nr_running accounting To: mingo@elte.hu Cc: rostedt@goodmis.org, ghaskins@novell.com, linux-rt-users@vger.kernel.org, linux-kernel@vger.kernel.org Date: Tue, 04 Dec 2007 15:44:31 -0500 Message-ID: <20071204204431.3567.28305.stgit@novell1.haskins.net> In-Reply-To: <20071204204236.3567.65491.stgit@novell1.haskins.net> References: <20071204204236.3567.65491.stgit@novell1.haskins.net> User-Agent: StGIT/0.12.1 MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1998 Lines: 72 From: Steven Rostedt This patch adds accounting to keep track of the number of RT tasks running on a runqueue. This information will be used in later patches. Signed-off-by: Steven Rostedt Signed-off-by: Gregory Haskins --- kernel/sched.c | 1 + kernel/sched_rt.c | 17 +++++++++++++++++ 2 files changed, 18 insertions(+), 0 deletions(-) diff --git a/kernel/sched.c b/kernel/sched.c index b062856..4751c2f 100644 --- a/kernel/sched.c +++ b/kernel/sched.c @@ -266,6 +266,7 @@ struct rt_rq { struct rt_prio_array active; int rt_load_balance_idx; struct list_head *rt_load_balance_head, *rt_load_balance_curr; + unsigned long rt_nr_running; }; /* diff --git a/kernel/sched_rt.c b/kernel/sched_rt.c index ee9c8b6..a6271f4 100644 --- a/kernel/sched_rt.c +++ b/kernel/sched_rt.c @@ -26,12 +26,27 @@ static void update_curr_rt(struct rq *rq) cpuacct_charge(curr, delta_exec); } +static inline void inc_rt_tasks(struct task_struct *p, struct rq *rq) +{ + WARN_ON(!rt_task(p)); + rq->rt.rt_nr_running++; +} + +static inline void dec_rt_tasks(struct task_struct *p, struct rq *rq) +{ + WARN_ON(!rt_task(p)); + WARN_ON(!rq->rt.rt_nr_running); + rq->rt.rt_nr_running--; +} + static void enqueue_task_rt(struct rq *rq, struct task_struct *p, int wakeup) { struct rt_prio_array *array = &rq->rt.active; list_add_tail(&p->run_list, array->queue + p->prio); __set_bit(p->prio, array->bitmap); + + inc_rt_tasks(p, rq); } /* @@ -46,6 +61,8 @@ static void dequeue_task_rt(struct rq *rq, struct task_struct *p, int sleep) list_del(&p->run_list); if (list_empty(array->queue + p->prio)) __clear_bit(p->prio, array->bitmap); + + dec_rt_tasks(p, rq); } /* -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/